The active component in the bait, is an anti-coagulant, the rats hemmorage internally after eating it and search for a water source.
I have recorded .35 inches of rain since the first of February this year, no standing water to speak of for 7 months, so they are roaming far to find water.
With the heat we have here, after they expire, they mummify/dry out so fast, they almost don't have a smell to them .